Often it's mounted down on the transmission, and you may have to go underneath the truck to see it. Take a look on the transmission for two or three electrical connectors all plugged in next to each other. Most manufacturers will group the electronics for the transmission together, for ease of install and removal of the transmission.

I don't know which one of them will be the backup switch, but if you have the new part in hand, you will likely find that each connector under there is unique to eliminate the possibility of plugging things in incorrectly, so it should become obvious which switch needs replacement.

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I have run into this problem and i found that the switch that operates alarm and inside light is bad, the switch is located on the latch, the latch may need to be removed to replace the switch. some dealers do not sell just the switch, i have run into this problem where switch is not replaceable the complete latch needs to be replaced.

Another problem i have run into is the wiring going into the hatch breaks, the wiring from bendine due to door opening and closing breaks a wire or two due to bending , locate wiring coming into rear hatch and check each wire,

1995 Isuzu Rodeo is equipped with a belt driven fan with a viscous fan clutch for engine cooling. The electric fan is for A/C condensor cooling only. The condensor fan is switched on and off by the A/C fan relay, which is operated by the triple pressure switch located in the A/C line on the left side of the engine compartment.

DO NOT attempt to replace the triple pressure switch without first using the proper equipment to evacuate and recover the freon in the A/C system. The A/C system is under high pressure and attempts to replace parts without discharging the system can result in serious injury.

My 97 Rodeo had the same problem. No Tail lights, no. Dash lights. There is also an annoying buzzer that goes with the set telling you the lights are on, there is no key in the ignition and your door is open. (you don't notice it when it's gone but you sure notice it when it's back)The Fuse (taillight Illum) was good, The Light relay under the hood was good and all bulbs were good.What fixed this problem was replacing the tail light relay which is located in a panel just to the left of the brake pedal also called the kick panel.Inside there are 3 relays. I replaced the one in the middle and got everything to work. If you need to identify the relay you can put your hand over it and then turn the lights on and off. The correct relay should click. Mine was the middle one. Hope this helps someone because it stumped me for months.

The O2 sensor needs to be replaced. There is a screw on the back side of the instrument panel that is removed and switched to another hole in the circuit board to reset the light for another 90,000 miles. Only a shop manual will have the exact location. You can try and obtain one from http://www.helm.com and buy one using print on demand.

I have a 94 Rodeo and am thinking its the same as your 93. The fuel filter is located underneath the rear passenger side frame rail. It is very easy to get to. All you need is a 10mm socket/wrench and pliers for the clamps.